batchoccuavg: Fits occupancy models for multiple species detection history...

In DiversityOccupancy: Building Diversity Models from Multiple Species Occupancy Models

Description

This function takes a data.frame with multiple detection history from various species in different sites, covariates of each site to calculate occupancy, variables specific to sampling days to calculate probability of detection. It features an automatic model selection when dredge = TRUE.

Usage

batchoccuavg(pres, sitecov, obscov, spp, form, dredge = FALSE, delta = 2)

Arguments

pres	a data.frame where rows are the sites and columns are a series of presence-absence observation from multiple species, every species needs to have the same number of observations.
sitecov	a data.frame where every row is a site, and every column is a measurement of that site, such as elevation or slope, this covariates are usually more constant.
obscov	a list where every element is a data frame with the daily covariates for each site, that is a measurement for each day, such as average temperature of a day, this covariates are usually very .
spp	the number of species in the pres data.frame
form	a formula in the format ~ obscov ~ sitcov, the first arguments will be used to calculate probability of detection and the second part the occupancy.
dredge	default = FALSE, if TRUE, for each species, the best occupancy model will be determined by fitting all possible models and ranking by AICc.
delta	default = 2, AICc difference used for model averaging

Details

This function fits the single season occupancy model of MacKenzie et al (2002), for multiple species and it can automatically select the best model for each specie based on AICc, ther result of this function is the model average.

Value

A list with the average models for each species.

Author(s)

Derek Corcoran <[e-mail]>

See Also

diversityoccu

Examples

## Not run: 
data("IslandBirds")
data("Daily_Cov")
data("siteCov")
BirdOccupancy <-batchoccuavg(pres = IslandBirds, sitecov = siteCov, obscov =
Daily_Cov, spp =  5, form = ~ Day + Wind + Rain + Noise + Clouds ~
Elev + AgroFo + SecVec + Wetland)
#Summary of averaged model for species 2
summary(BirdOccupancy$models[[2]])

## End(Not run)
#Dredge for all species

DiversityOccupancy documentation built on May 2, 2019, 12:35 p.m.